fetchArticles method implimented in datastore, modified Articles coredata
merge conflict resolved
Add navigation controller to modal compose flow
deleted GreatistAPI and related classes
Merge branch 'GreatistAPI'
deleted articleCell files
Article references removed
Merge branch 'GreatistAPI'
Add required facebook info to plist
Create singleton FacebookAPIClient
Add facebook login VC
Merge branch 'feature/facebookLogin'
Re-add old Facebook API client
Merge branch 'master' into postParse

Conflicts:
	Greatist Message Publisher/Greatist Message Publisher.xcodeproj/project.pbxproj